It's pretty simple. I just put it in to see if anything happened. Put in SITHLORD and you will get the Darth Vader costume. Other cheats are: CORTOSIS: Immune to all damageSPEEDER: 1,000,000 Force Points.VERGENCE:Infinite Force Power.GRANDMOFF: Unlock all bonus costumes and Sith Stalker costume. That costume is my personal favorite. LIGHTSABER: Massive Lightsaber damage*Note:Using the bonus costumes like Mara Jade, 501st Legion, etc.(except Sith Stalker) the cutscenes will be deleted.

When you have completed the first mission go to 'Extras inside the Rogue Shadow and select the 'Cheat Codes' option. Then enter the following codes (without the quotes) to activate the corresponding effect in the game. Remember that the game cannot be saved when non-costume codes have been enabled.

Grandmoff:unlocks all costumesCortosis: god mode/ invincableKatarn: maxes out all force powersVergence: unlimited force powersTyranus: unlocks all force powersLightsaber: gives your lightsaber powers of the hulk!!!!!!Speeder: gives you 1,000,000 points for force upgrades butu wont need it if you use max all force powers>Ok now that you are invincable and on you're way to become the most powerful I just want to spoil the game the apprentace dies at the end!!!!Ok by the way I have beaten the game 3 times in under 12 hours non stop